Sinclair International's 20 Caliber stainless steel neck turning mandrels are precision-crafted from high-grade stainless steel for expert handloaders.
The mandrels are designed with specific tolerances: turning mandrels are sized .002 inch under bullet diameter, while expander mandrels are .001 inch under bullet diameter.
Large caliber mandrels, which range from 35 to 50 caliber, are only compatible with the Large Caliber Expander Body and NT-5000 Turning Tool.